MyBB Community Forums

Hey you all,
I want to know what this setting mean:

Quote:Read Threads in Database (Days)
The number of days that you wish to keep thread read information in the database. For large boards, we do not recommend a high number as the board will become slower. Set to 0 to disable.

And what is the best value to put there..?

I guess you know about mark read link on the forums - the setting keeps read records in database

when you visit a forum display page , unread threads appear in bold AND read appear in normal style
above referred setting is related to this feature ...

so what is the recommand number of days to put there?

^ 10 OR 20 OR 30 - not more than 30 !!

If you're unsure then just leave it as it is. Basically if you want threads to appear unread for people for longer then just increase it.